//alert(browser);//IE 11.0
//IE11以下： MSIE 10.0、MSIE9.0等
//chrome：chrome/41.0.2272.89 [返回的是個數組]
//firefox: firefox/42.0 [返回的是個數組]
var verinfo = (browser+"").replace(/[^0-9.]/ig,""); //瀏覽器版本
//alert(verinfo);//11.0
//IE瀏覽器: 11.0/10.0/9.0
//chrome瀏覽器：41.0.2272.89
//Firefox瀏覽器： 42.0
function getBrowserInfo()
{
var agent = navigator.userAgent.toLowerCase() ;
//console.log(agent);
//agent chrome : mozilla/5.0 (windows nt 6.1; wow64) applewebkit/537.36 (khtml, like gecko) chrome/41.0.2272.89 safari/537.36
//agent firefox : mozilla/5.0 (windows nt 6.1; wow64; rv:42.0) gecko/20100101 firefox/42.0
//agent IE11: mozilla/5.0 (windows nt 6.1; wow64; trident/7.0; slcc2; .net clr 2.0.50727; .net clr 3.5.30729;
//接上.net clr 3.0.30729; media center pc 6.0;infopath.2; .net4.0c; .net4.0e; rv:11.0) like gecko
(可以看出IE11中不包括MSIE字段)
//agent IE10: mozilla/5.0(compatible; msie 10.0; windows nt 6.1; wow64; trident/6.0)
var regStr_ie = /msie [\d.]+;/gi ;
var regStr_ff = /firefox\/[\d.]+/gi
var regStr_chrome = /chrome\/[\d.]+/gi ;
var regStr_saf = /safari\/[\d.]+/gi ;
//IE11以下
if(agent.indexOf("msie") > 0)
{
return agent.match(regStr_ie) ;
}
//IE11版本中不包括MSIE字段
if(agent.indexOf("trident") > 0&&agent.indexOf("rv") > 0){
return "IE " + agent.match(/rv:(\d+\.\d+)/) [1];
}
//firefox
if(agent.indexOf("firefox") > 0)
{
return agent.match(regStr_ff) ;
}
//Chrome
if(agent.indexOf("chrome") > 0)
{
return agent.match(regStr_chrome) ;
}
//Safari
if(agent.indexOf("safari") > 0 && agent.indexOf("chrome") < 0)
{
return agent.match(regStr_saf) ;
}
}